MODIS Data Available through SeaWiFS/SIMBIOSan Ocean Discipline Prototype for VIIRS

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anNPP Prototyping Activities

• Using MODIS data to develop prototype for NPP/VIIRS ocean data processing, distribution, and community support- design based on ‘lessons learned’, capitalize on

what already exists, strive for flexibility

• Infrastructure Development- interfaces, data flow and volume, ancillary data

requirements, processing capacity

• Processing Capability- flexible software design to facilitate algorithm

implementation, modification, and verification

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anMODIS Data Available

• Level-1A (MOD01SS) ocean subsetted L1A from GSFC DAAC.

• Geolocation, (MOD03) generated from definitive attitude and orbit using UW IMAPP (slightly modified)

• Level-1B (MOD02) generated with standard MCST code and LUTs

• Level-2, generated using SeaWiFS/SIMBIOS MSL12 code and current RSMAS vicarious calibration

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anLevel-2 Product Suite

• Normalized radiances in 6 bands

• OC3M Chlorophyll (chlor_a2)

• SST (11um, standard MODIS nlsst algorithm and coefficients

• K490, AOT(869), Ångstrom

• Typical files size for 5-minute granual is 10-20 MB, compressed.

• Other products can be generated with MSL12 (flexibility)

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anData Distribution

• Direct download from the SeaWiFS browser http://seawifs.gsfc.nasa.gov/

• Single file point-and-click download and bulk order staging for ftp pull

• Rolling archive of most recent MODIS data on anonymous ftp site

• Near real-time image support 22 cruises since support for MODIS dataadded on July 9. 70% of those asked forMODIS data in addition to SeaWiFS.

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anRolling Archive

• Anonymous ftp site ftp://oceans.gsfc.nasa.gov/

• Most recent 10 days of MODIS/Aqua and MODIS/Terra

• Level-1A, Level-1B, Level-2, and Geolocation available

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anSummary

• A prototype data processing and distribution system for NPP/VIIRS is being developed using MODIS data.

• Data production is now operational, and the products are freely available.

• Methods of data distribution are in place, and enhancements continue.

• We encourage you to evaluate the system and products, and we welcome your feedback.